E-chĭd'nă, n.

noun

(ē-kĭd'-nă), n. [Gr. ἔχιδνα, adder, viper; Fr. échidné.] (Zoöl.) A genus of ant-eaters, found in New Holland. They are monotrematous, toothless mammals, nearly allied to the duck-bill, or ornithorhyncus.

An engraving of a spiny porcupine ant-eater facing right.
Porcupine Ant-eater (Echidna hystrix).